This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.
The k3 attribute defines one of the values to be used within the arithmetic operation of the <feComposite> filter primitive.
The pixel composition is computed using the following formula:
result = k1 * i1 * i2 + k2 * i1 + k3 * i2 + k4;
You can use this attribute with the following SVG elements:
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
<filter id="composite1" x="0" y="0" width="100%" height="100%">
<feComposite
in2="SourceGraphic"
operator="arithmetic"
k1="1"
k2="0"
k3="1"
k4="0" />
</filter>
<filter id="composite2" x="0" y="0" width="100%" height="100%">
<feComposite
in2="SourceGraphic"
operator="arithmetic"
k1="1"
k2="0"
k3="10"
k4="0" />
</filter>
<image
href="mdn.svg"
x="0"
y="0"
width="200"
height="200"
filter="url(#composite1)" />
<image
href="mdn.svg"
x="220"
y="0"
width="200"
height="200"
filter="url(#composite2)" />
</svg>
| Value | <number> |
|---|---|
| Default value | 0 |
| Animatable | Yes |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
k3 |
5 | 79 | 3 | 15 | 6 | 18 | 4 | 14 | 6 | 1.5 | 4.4 | 6 |
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https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/Attribute/k3